FlightGear offers a very powerful functional scripting language called Nasal, which supports reading and writing of internal FlightGear properties, accessing internal data via extension functions, creating GUI dialogs and much more. Please see the right navigation bar to get additional information.

# to be saved in $FG_ROOT/Nasal/hello.nas
  print( "Hello World!" );

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Nasal scripting

What is Nasal? Success stories Nasal FAQ Nasal Snippets Howto:Syntax highlighting for Nasal
Tools and utilities Console • REPL Console • Browser
Getting started Nasal Best Practices Nasal for C++ programmers Creating new Nasal scripts Nasal Hello World Howto:Create a new Nasal module Using Nasal functions Nasal Variables Nasal Namespaces Namespace and Methods Nasal Namespaces in-depth Nasal Conditionals Nasal Loops Numbers in Nasal Nasal Operators Howto:Use vectors and foreach loops to write shorter code Howto:Start using vectors and hashes in Nasal Nasal library (core/extension functions) `clipboard` namespace `debug` namespace `geo` namespace `io` namespace `math` namespace `os.path` namespace `props` namespace `string` namespace flightplan library Howto:Write a parser in Nasal Nasal Flightplan OOP Introduction Object Oriented Programming with Nasal Nasal Callbacks Explained Exception handling with Nasal Using listeners and signals with Nasal Developing and debugging Nasal code
Advanced Tutorials Caching Nasal function calls Nasal Unit Testing Framework (WIP) Nasal Meta-Programming A GPX flight logger in Nasal Multiplayer scripting in Nasal Howto:Making HTTP Requests from Nasal Howto:Transmit properties over MP Howto:Terrain sampling in Nasal Howto:Create a new system in Nasal Howto:Load a Nasal file at runtime Howto:Control the route manager in Nasal Howto:Get a number of elevation offsets for a number of objects Howto:Nasal in scenery object XML files Howto:Create animation XML files from Nasal Howto:Port I/O from Nasal Howto:Continuation-passing style programming in Nasal Howto:Start worker threads using listeners in Nasal Howto:Developing a DSL interpreter in Nasal Howto:Nasal Metaprogramming Nasal/JavaScript Subset
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Nasal internals

Modernizing FlightGear Scripting Nasal Maintenance Nasal Initialization Howto: Extend Nasal Nasal Events Nasal HLA standalone Improving Nasal User:Philosopher/Optimization findings User:Philosopher/Nasal_introspection How to add a new binary operator to Nasal Nasal/CppBind (wip)
Memory Management (GC)
Nasal GC Musings How the Nasal GC works
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Nasal scripting language

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